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Maintenance and Service
Troubleshooting
The air conditioner may be operating abnormally when:
Problem
I The air conditioner is
I The fuse is blown/circuit
Air
conditioner
I Power failure.
does not start
I Airflow is restricted.
I The thermostat may not be
I The air filter is dirty.
Air
conditioner
does not cool
I The room may have been
as it should
I Cold air is escaping.
I Cooling coils have iced up.
I Ice blocks the air flow and
Air
conditioner
freezing up
* You can refer to the Energy Star program in detail at www.energystar.gov.
30 Room Air Conditioner
Possible Causes
unplugged.
breaker is tripped.
set high enough.
hot.
stops the air conditioner from
cooling the room.
What To Do
• Make sure the air conditioner plug is
pushed completely into the outlet.
• Check the house fuse/circuit breaker
box and replace the fuse or reset the
breaker.
• If power failure occurs, turn the mode
control to Off.
When power is restored, wait 3
minutes to restart the air conditioner
to prevent tripping of the compressor
overload.
• Make sure there are no curtains,
blinds, or furniture blocking the front of
the air conditioner.
• Turn the knob to a higher number.
The highest setting provides
maximum cooling.
• Clean the filter at least every 2 weeks.
See the care and Maintenance
section.
• When the air conditioner is first turned
on, you need to allow time for the
room to cool down.
• Check for open furnace floor registers
and cold air returns.
• See Air Conditioner Freezing Up
below.
• Set the mode control at High Fan or
High Cool with thermostat at 1 or 2.
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